You usually get seen with Sneak if you attack/fight. Granted, on higher levels if it happens to be dark and moody you can kill of a few people without being seen (the 'I've been hit by six arrows and yet I can't be bothered to find out why' AI), but unless you're using magical assistance, you'll always get spotted at some point.
Personally I use sneak until I get an arrow in them, then charge. Occasionally a good smack in the back with whatever I'm carrying, then fight as per usual.
I level pretty easily on Acrobatics because I have a habit of taking shortcuts through town by vaulting over walls, and have an unhealthy obsession with near-vertical descent routes when walking in the Jerral Mountains. I don't think you need to major in it to get it up quickly.
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I hate the mice from Bagpuss. Never trust rodents with DIY skills.
"We will fix it, we will fix, we will stick it with glue, glue, glue, we will stickle it, every little bit of it, we will fix it like new, new new."
::SQUISH::
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